NEXSEM NX1730
NX1730 is a 3A source and sink Low Dropout Regulator n designed for DDRI and DDRII termination application. NX1730 is available in TO-252 package for low cost yet excellent thermal capability. n The NX1730 can also be used as an adjustable output voltage regulator using an external reference.DESCRIPTION
n Current limit circuitry in both sink and source side plus n internal thermal shutdown protects the device under short n circuit condition . NX1730 can be disabled by pulling n down the Reference Pin below 0.2V using external small n signal transistor or a MOSFET. n n n n nFEATURES
Independent power sequencing Support DDR I (1.25V VTT) and DDRII (0.9V VTT) 3A Source and Sink current capability Shut down by pulling REFEN pin low Current Limit Thermal Shut down TO-252 packageAPPLICATIONS
DDR Memory Termination Supply Desktop Motherboard or Notebook applications Graphic Card Set Top Box Active Terminal Bus Termination TYPICAL APPLICATION VCNTL +3.3V CCNTL 1uF VCNTL VIN CIN 100uF VIN +2.5V 2N7002 EN C1 0.1uF R1 100k NX1730 REFEN VOUT R2 100k GND Co 100uF VOUT +1.25V R3 1k Figure1 - Typical application of NX1730 Device NX1730CDTR NX1730CMTR Rev. 1.0 01/24/05 Temperature 0 to 70o C 0 to 70o C ORDERING INFORMATION Package TO-252-5L MLPD-8L 1 NEXSEMABSOLUTE MAXIMUM RATINGS
(NOTE1) Input Voltage .................................................